* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --radius: 16px;
    --gap: 12px;
    --transition: 0.5s cubic-bezier(.25, .9, .25, 1);
    --bg: #DAD2D8;
    --text: #fafafa;
    --accent1: #143642;
    --accent2: #143642;
    --accent3: #143642;
}

body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: start;
    align-items: center;
    min-height: 100vh;
    color: #143642; 
    background: #DAD2D8;
    margin: 0;
    min-height: 100vh;
    flex-direction: column;
    align-items: center;
    background: var(--bg);
    color: var(--text);
    font-family: "Inter", system-ui, sans-serif;
}

h1{
    color: #143642;
}

h2{
    color: #143642;
}

p{
    color: #143642;
}

.container {
    text-align: center;
}


h2 {
    color: #556;
    font-size: 3em
}

.accordion {
    display: flex;
    gap: var(--gap);
    width: min(1000px, 95vw);
    height: 320px;
}

details {
    flex: 0 0 90px;
    border-radius: var(--radius);
    overflow: hidden;
    background: #DAD2D8;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transition: flex-basis var(--transition), transform var(--transition);
    position: relative;
}

details[open] {
    flex: 1 1 auto;
    transform: translateY(-4px);
}

/* Rotated summary */
summary {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    list-style: none;
    color: #DAD2D8;
    background: var(--accent1);
    transition: opacity var(--transition), background var(--transition);
    user-select: none;
}

details:nth-child(2) summary {
    background: var(--accent2);
}

details:nth-child(3) summary {
    background: var(--accent3);
}

summary::-webkit-details-marker {
    display: none;
}

/* Fade out summary when open */
details[open] summary {

    pointer-events: none;
}

/* Inner content */
.content {
    position: absolute;
    inset: 0;
    padding: 30px 40px;
    background: #DAD2D8;
    opacity: 0;
    transform: translateX(40px);
    transition: opacity var(--transition), transform var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

details[open] .content {
    opacity: 1;
    transform: translateX(0);
    position: initial
}

.content h3 {
    margin-top: 0;
    font-size: 1.5rem;
}

.content p {
    color: #555;
    line-height: 1.5;
    max-width: 480px;
}

/* Responsive vertical stack */
@media (max-width:700px) {
    .accordion {
        flex-direction: column;
        height: auto;
    }

    details {
        flex: 1 1 auto;
    }

    summary {
        writing-mode: horizontal-tb;
    }
}

/* .progress-bar {
    width: 400px;
    height: 30px;
    background: #e0e0e0;
    overflow: hidden;
    margin-bottom: 15px;
    position: relative;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #4CAF50, #45a049);
    transition: width 0.3s ease;
    position: absolute;
    top: 0;
    left: 0;
}

.progress-text {
    font-size: 16px;
    font-weight: bold;
    color: #333;
    position: absolute;
    top: 50%;
    left: 15px;
    transform: translateY(-50%);
    z-index: 1;
    mix-blend-mode: difference;
} */